Suspension arm



FIG. 1 is a front elevational view of suspension arm showing my design;

FIG. 2 is a left side view thereof;

FIG. 3 is a top elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a bottom elevational view thereof;

FIG. 7 is a perspective view thereof; and,

FIG. 8 is a perspective view in alternative position. 

The ornamental design for a suspension arm, as shown and described. 